100 



PELL SYSTEM I ECU SIC AL JOIRSAI. 



The representation of the characteristits of the structures of Table 

 III is similar to the scheme of Table II. The figures at the top and 

 side (for example 1-3') indicate res|x>ctively, the series and shunt 

 reactance meshes of Figs. 5 and 42 which form the prototype sections. 



OfCDO/OO OftDOfOD OfOOOfOO OfODOfCO 



15 IG 17 IQ 



OfmOfOO OfmOfCD OfOOOfOD OfOOOfCD 



13 ZO 21 Zl 



ofooofo) ofaoofoo ofcoofm ofooofco 



23 24 Z5 26 



ofroofoD ofcoofm ofooofoo oofoaofoa 



27 28 23 30 



OfOOfOD OfWOfOD' 



31 32 



Fig. 4-1 — Pro|Ktgatioii Constant (.-Xttcnualion and Phase Constant) Characteristics 

 of Kilter Sections Containing .Negative Inductances, Shown in Symbolic Fonii 



The figures in the corres[M>iKling box (for example, 15— 1 — *) indicate 

 that the structure has propagation characteristic No. 15 of Fig. 44, 

 and mid-series image impedance No. 1 of Fig. 8. The symbol * 

 indicates, when inserted in the sec-ond or third position, that the 

 structure is not plnsicalK- capable of mid-series or mid-shunt termina- 

 tion, res|)ecti\el\'. 



It will lje noted that only one low pass prototype section (1—3') 

 is given in the table, exclusive of special cases of band filter structures. 



